Dan Bárta (born 14 December 1969 in Karlovy Vary) is a Czech rock singer.Discogs - Daniel Bárta (profile and discography) He's a founding member of Alice (1990-1997).Discogs - Alice (profile and disco
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515f11f67cf43e2dd5675ab8929a72f88364896258b42a1c493a0e12fb018831. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85f30b45-b519-430d-af7b-92ce2090f06f.json and https://artists.proofprofile.net/proofs/artist/85f30b45-b519-430d-af7b-92ce2090f06f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572e5a95e0ca8dabe450f772a544795154ceddaddeff0f190d5cdb1021f1a6e9. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA100201044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ac6993f4863f305e0e1bcd5f679222a3fb12c20aa4902a886b31d02f7d5496. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA100201042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e2b88e11908d09b6941f378bfda237e181f0b72f770d9eb70ef6deacadbf6. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA100201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f0105ffbac1e09036449f9795f609f6a475e79435a22fc0c31e13ca0582bb6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA100201043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32234af5a931e5aefc460bbe2798e09db213b975e747621f4539ae4af80bdea. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA210800712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e5b39f7de57565843d405eb03fdd84fd13bac3900ed922d39096d5b431ceb9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA210800713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d5f01557b29939d837c79b234fa049f23f98315c0d807584855e229ff194f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA210800719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dee4861a8fcdd52eb2ec78712d9c5c00e9cd4cedd8698dbed9fa813487e3668. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4be863287ef715925b299ea153a6d7efa46a3307afc4b55d551e5587c3026de. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc078c21519496043344d719b11a127f244f557b5ff9edd3bbcb97863ddcfa2f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1330a1cbf5b1e5fc7e0b4272d088c9b6d248c9e63cd2b607afdd22154ea51b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa540c898dee536d022226cea4971171e97d8cac25b66391209a651b7b271ab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27106ceb20d88eff9b63b4ba43ef8c060e738be393d97ed5866f7b3ea0b4bfce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1330a1cbf5b1e5fc7e0b4272d088c9b6d248c9e63cd2b607afdd22154ea51b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c17a957643a9f6d1beb2e8a25a24a886b1955c13ec78efe006813a46ceb3d3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa540c898dee536d022226cea4971171e97d8cac25b66391209a651b7b271ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG561354309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f323007ada5344287892db14c63f7bc4e215182050ab5317c4b8c5d19bbbd4. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454006690c7bacea133e55e1e40355e8c811d864079e89270d2b633a3906b147. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f836337f38082341a56dd43f4e30327d3b832e1ed6ae60768654c4b0dee134. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d494b77e84a9aa8650a0ebf57a0fbc7f3d57858072ab1bda88e61b662e65f91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b68b2d164e0abe6eaeacfbf71d4f178cf126ba4f0dee083c3b84c308ed11fc. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43bf0692b25a5d2073a1ab097162e9cba7593aa453712ddf508e72ceda608e9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6c30de22cf56c3d90000ce210141a118ed29e9c35dede335ef240c02fdfe2f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071cb17e3f6a23c956e4486d6d94a87e8d50e93308f97b3343496fb6c18970ab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c288bd62409bda92c4cde545113b1a0f30e81ce05c9d92ce5cdc640f34ba7ac. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZG562020013.
I Killed This Song At Karaoke Last Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240af0bb063de7edb9a7fe038990fc4c7dd0a3bc2b189abb22d38c39dabae9b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA100201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e23b3ab0352b7ec6009b1a54ffc1d2a7df2b81eaa79ebe15406839292cdc37. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA239400263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1555449902300017ce4c9d04395c9e1a8679163c8c0dfedca72e364704d6eabf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH241200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e659d2baeee2084db97dbdaa368f38bd76b731576a3c204d332dc0cda9c1d02. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD401709002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbd0433c28e527a1ccfa9250242ddf30806995c99d8d72996132bf5c9e49070. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZD401709007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7f8657ee2713ec66875e4ee5b0f355d1825eaf512971af5fdfabb14f689d71. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA940202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb794afd6eb5cd10f9c9c6546db92f2bbc94d14768c11e0b474d0109a763d06e2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA940202006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946d3610fe90c8faef473cd422cfa714f7344422765c482ce7254a67288a1cd4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH241000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81606d1dce9a77b2514899f158d141e9bc4c5d0b2d99b33c804e65755ef3e347. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA140200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256c7936a546131e9c80c946aaf78d4093bb843fc90af24e7bfac4495e84ae47. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SKP592400287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b8fe8c14f60ee86548c7beb3cc11cd520af4066f155f92eee47a4cd14814cb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZH451100011.